these 2 derivations will be built:
  /nix/store/4rl9i5ppx1p7pa1yxqndssjsaxn3x4ah-handy-0.9.8.drv
  /nix/store/ml95frl9w1jjv82qw8zcpwdz8hphxrjm-check-handy.drv